Half-Life - Perl

In addition to setting Booleans, Getopt::Long.pm also supports processing string and numeric command-line arguments entered by the user. To illustrate how this works, consider the following simple example:


#!/usr/bin/perl
 
# import module
use Getopt::Long;
 
# read options
$result = GetOptions ("age=i" => $age);  
      

# print value
if ($age) { print "Input age is $age years"; }



Here's the output:

$ ./script.pl --age=89
Input age is 89 years

Here, the "i" data type specifier tells Getopy::Long.pm to expect an integer value after the option name. You can also use "s" for strings, as in the following example:


#!/usr/bin/perl
 
# import module
use Getopt::Long;
 
# read options
$result = GetOptions ("name=s" => $name);  
      

# print value
print "Input name is $name";



Here's the output:

$ ./script.pl --name=John
Input name is John